One of the last projects on my 54 Chevy 3100 is to get the gas gauge working. So far I am not having any luck and I have went through several troubleshooting steps. With everything I am seeing it should work but it doesn't. I have a new sender in the tank that is grounded very well. The tank is between full and 1/2 full and its reading about 18 OHMs which I think sounds reasonable. The gas gauge is a brand new 12 volt gauge from Classic Parts. At the moment I have the gauge cluster out and would like to make the gauge work before I install it because getting the gauge cluster in and out is not the easiest thing ever. I put 12 volts of power to the terminal labeled +. I put a ground to the back plate that contacts the gauge cluster housing. And I put the sender wire to the S terminal. Whether the S terminal is hooked up or not the gauge just reads Full. If I reverse power and ground the gauge reads Empty. It just seems to be unaffected by the sender. When I say it reads full or empty it goes way past full or empty which I think may be another problem altogether. There is almost 180 degrees worth of needle movement and it looks like there should only be about 90 degrees of movement.Can anyone tell me is this normal? Any thoughts or suggestions why the sender is having no affect on the gauge? Thanks